The tracking_number function within the mock-jutsu library is a specialized tool designed for developers and QA engineers working on e-commerce platforms, logistics management systems, or supply chain applications. By generating realistic mock data that mimics the format of major global shipping carriers, this function allows teams to simulate complex fulfillment workflows without relying on sensitive production information. Whether you are building a customer-facing order history page or a backend shipping notification service, having access to high-quality test data is essential for ensuring system reliability.
Technically, the tracking_number utility in mock-jutsu is built to replicate the specific alphanumeric structures and checksum algorithms used by industry leaders such as UPS, FedEx, USPS, and DHL. By incorporating logic that follows standard validation rules—such as Modulo 10 or Modulo 11 check digits—the function ensures that every generated tracking_number passes basic input validation and regex patterns. This level of technical accuracy is vital for testing database constraints, API request schemas, and third-party integration points that require strict adherence to logistical data standards.
In practical testing scenarios, this function proves invaluable for verifying shipment status updates and automated communication triggers. For example, developers can use mock-jutsu to generate a diverse set of tracking identifiers to test how an application handles different carrier formats or to validate that webhook listeners correctly parse incoming logistical data. Using realistic test data helps identify edge cases in string parsing and UI rendering that might be missed when using generic placeholder text. This proactive approach to testing reduces the likelihood of bugs reaching the production environment.
Beyond its technical precision, mock-jutsu offers significant developer benefits by streamlining the data generation process across various environments. Whether you are using the Python API for unit testing, the CLI for quick data prototyping, or the JMeter plugin for performance testing, the tracking_number function provides a consistent and scalable solution. By automating the creation of valid-looking shipping identifiers, mock-jutsu allows engineering teams to focus on building core features and improving user experiences rather than manually crafting complex test datasets.
mockjutsu generate tracking_number --carrier uspsmockjutsu bulk tracking_number --count 10mockjutsu export tracking_number --count 10 --format jsonmockjutsu export tracking_number --count 10 --format csvmockjutsu export tracking_number --count 10 --format sqlmockjutsu generate tracking_number --carrier fedex# --mask: regulation-compliant output (PCI DSS / GDPR / KVKK)mockjutsu generate tracking_number --maskmockjutsu bulk tracking_number --count 5 --maskfrom mockjutsu import jutsujutsu.generate('tracking_number')jutsu.bulk('tracking_number', count=10)jutsu.template(['tracking_number'], count=5)# with --carrier parameterjutsu.generate('tracking_number', carrier='fedex')# mask=True: regulation-compliant outputjutsu.generate('tracking_number', mask=True)jutsu.bulk('tracking_number', count=5, mask=True)${__mockjutsu_ecommerce(tracking_number)}${__mockjutsu_ecommerce(tracking_number:fedex)}# JMeter Function: __mockjutsu_ecommerce# Parameter 1: tracking_number OR tracking_number:# Qualifier values: fedex|ups|usps|dhl# Parameter 2: (not required for this function)# Add 'mask' keyword to get a regulation-compliant masked value${__mockjutsu_ecommerce(tracking_number,mask)}GET /generate/tracking_number# → {"type":"tracking_number","result":"...","status":"ok"}GET /bulk/tracking_number?count=10POST /template {"types":["tracking_number"],"count":1}# mask=true: regulation-compliant outputGET /generate/tracking_number?mask=trueGET /bulk/tracking_number?count=5&mask=true| Parameter | Values | Description |
|---|---|---|
| --carrier | fedex|ups|usps|dhl | Logistics carrier |
| --mask | true | false | Return a regulation-compliant masked value (PCI DSS, GDPR, KVKK…) |